You're mixing up two VC10s. The one that was bent was G-ARTA, but this happened at Gatwick. See here for photos:
C/n 803 - G-ARTA (there is also a link there to a page on British-Caledonian.com with a very complete account of that final flight).
The one at Bedford was not bent in any way, but this was also an ex-BUA one:
C/n 825 - G-ATDJ - XX914